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Hollow composite products and method for making same

Inactive Publication Date: 2005-10-18
OCV INTELLECTUAL CAPITAL LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0005]The present invention seeks to obtain novel composite products which are particularly suited to use as structural and / or energy-absorbing components (for example as bumper members for motor vehicles, protective spars, energy-absorbers for bumpers, structural components for boats, support girders, etc.). Another object of the invention is to provide a fast and economical method for manufacturing these products.

Problems solved by technology

These existing methods, which use different pressures, different treatment steps and different starting materials (not generally including long reinforcing fibres) are not suited to the manufacture of composite products as sought after according to the invention and / or are uneconomical (for example, they employ costly inflatable silicon bladders) and / or are suited only to short production runs (10 to 15 items per day) and / or may also, in the case of some of them, present problems in terms of environmental concerns.

Method used

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  • Hollow composite products and method for making same
  • Hollow composite products and method for making same
  • Hollow composite products and method for making same

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second embodiment

[0044]Parts (a), (b), (c), (d), (e), (f) and (g) in FIG. 2 are a very diagrammatic depiction of the various stages of the method according to the present invention. In this method, a woven 20 consisting of composite glass / organic thermoplastic yarns and lined on one of its faces with a leaktight film 21 (part a in FIG. 2) is placed on a support 22 and is then preheated in an oven 23 (part b) before being rolled up on itself so that the film is on the inside (part c). The preheated woven / film assembly 24 is placed in a heated compression mould 25. A needle 26 is then introduced into the assembly (part d), and once the mould has been closed, air is injected at a pressure in excess of 40 bar (part e). Once the moulded component has solidified, the air is removed, the mould is opened and the composite component is withdrawn from the mould (part f). This then, for example, yields the component, the cross section of which is depicted as part g.

third embodiment

[0045]Parts (a), (b), (c), (d), (e), (f) and (g) in FIG. 3 are a very diagrammatic depiction of the various stages of the method according to the present invention. In this method, two wovens 30, of the kind depicted in Figure a, these wovens each consisting of composite glass / organic thermoplastic yarns and each lined on one of their sides with a leaktight film 31 are placed on a support 32 then preheated in an oven 33 (part b). On leaving the oven (part c), the wovens are joined in such a way that the films face each other and thus form the leaktight inflatable bag (the edges 34 of the wovens being held joined together during moulding so as to ensure leaktightness) and the preheated wovens with films assembly is placed in a heated compression mould 35. A needle 36 is then introduced into the assembly (part d) and after the mould has been closed, air is injected at a pressure in excess of 40 bar (part e) After the moulded component has solidified, the air is removed, the mould is o...

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Abstract

The invention concerns a hollow composite product comprising over 20% glass in the form of long fibres, the thickness of the product walls further ranging between 1 and 10 mm about. The invention also concerns a method for making said product, which consists in inserting in a mould (10) a preheated assembly (9) comprising in its core at least an inflatable pocket covered with at least a composite structure, the composite structure including at least a filler material in the form of long fibres and the preheated assembly including a material capable of creeping, and in inflating the inflatable pocket under pressure higher than 40 bars.

Description

BACKGROUND OF THE INVENTION[0001]1. Field of the Invention[0002]The present invention relates to novel composite products and to a method for manufacturing these products. The expression “composite product” is to be understood as meaning “a product comprising at least two substances with different melting points” and the term “hollow” product is to be understood as meaning that the product has, inside it, one or more hollow parts surrounded by walls, the hollow part or parts inside the product being empty or filled with one or more filling materials.[0003]2. Discussion of the Background[0004]The composite products are generally solid moulded products obtained by injection or compression 15 moulding in a mould or press. These products may be suitable for various types of application depending on the materials used and the shape.SUMMARY OF THE INVENTION[0005]The present invention seeks to obtain novel composite products which are particularly suited to use as structural and / or energy-...

Claims

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Application Information

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IPC IPC(8): B29C70/04B29C49/20B29C70/44B29C49/00B29C49/42B29C49/44B29C43/18B29C43/10B29K105/06B29L22/00
CPCB29C49/20B29C70/446B29C49/0047B29C49/44B29C2049/0089B29K2105/08B29K2105/258B29C2949/08B29C49/0691
Inventor ZANELLA, GUYDUFAYARD, GILBERT
Owner OCV INTELLECTUAL CAPITAL LLC
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